01 Background
A billboard with the size 200 x100 feet., euqipped with 1000W HID x15 and 1500W HID x8 and the mean illuminance was 20 lx. This billboard is the front facade of the headquarter building where a international retail company locates. The top management team considers this billboard as one of the signatures of this company. The team asked to increase the illuminance to 100 lx.
02 The Challenge
This billboard is gigantic compared with ones by highways which is around 40x13
feet.
Due to its huge size, the difficulty would be the unifomity and how much energy can be
saved.
Original Luminaires
Luminaires Used：1000W HID x 15 pcs
Total Energy Consumed：27,000 W
Mean Illuminance：20 lx ( Suggestion：50 lx up )
Uniformity：0.15
